Did you guys fully bleed the hydraulic system?
Clutch Bleed procedure/Clutch pedal adjustment
I had a similar problem, my hydraulics were not fully bled, well, also my flywheel bolts backed out after about 200 miles too, which caused the opposite to happen, LOL! But the slave cylinder has to be romved from the tranny case and left hanging, with the fluid cap off, and then manually work the plunger at least 10 times (my tech did it 25 to be safe). and gotta work the clutch pedal before and after. Should be good to go, UNLESS you need a new slave cylinder or master........but at least this much is relatively free to start with.
__________________
Mods: AGP GT3076R DBB Turbo
"The Cobalt firmly grabs you and whisks you along your way instantly. It does so with authority and poise, but while slipping relatively unnoticed through traffic, never being violent, or dare I say it, frightening. When you ask the SRT-4 to take you somewhere fast, it punches you in the face, throws you over its shoulder, and runs, screaming, so quickly that its tires can barely keep up."